The two-speed control allows motor RPM (fan speed) to operate between two discreet speeds (A or B) through an SPDT switch or relay connected to the dry contact input or through wet voltage (115-230VAC) applied to the digital input terminal. This control accepts an input voltage of 115/208-240V and is intended for use with Greenheck's Vari-Green motor. Recommended for use in schools, restaurants, multi-family structures and condos where manual or demand controlled ventilation applications requiring high and low speed operation exist.

• Accepts input voltage of 85-277VAC
• Intended for use with Greenheck's Vari-Green motor and Vari-Green Drive

For natural gravity or positive pressure systems, model GRS offers excellent performance and durability for intake or relief applications. Featuring an exceptional low silhouette design and rugged construction this model is both efficient and economical.

• 19 x 19 inch base with prepunched mounting holes for easy attachment to roof curb
• All aluminum exterior for corrosion-resistant construction
• Integral birdscreen to prevent entry of birds and small objects

The Constant Airflow Control is used to monitor velocity pressure in a system, automatically adjusting the fan speed to maintain a desired velocity pressure (constant CFM). This control reduces energy consumption not only by reducing the speed and the energy used by the fan, but will also reduce the amount of conditioned air that is exhausted. Recommended for use in multi-family structures, hotels and schools where demand control ventilation applications exist.

• 2-line, backlit display
• Dedicated airflow control mode
• Integral pressure transducer maintains compact form
• NEMA-4 enclosure on all components
• Pressure range of +/- 1.0 inch wg
• Intended for use with Greenheck's Vari-Green motor and Vari-Green Drive

The Indoor Air Quality VOC control senses the level of volatile organic compounds (VOCs) in a space and automatically adjusts the ventilation rate to the space by increasing or decreasing the speed of the fan based on the level of VOCs present. Up to 10,000 unique VOCs exist and Greenheck's VOC sensor can detect all of them. Recommended for applications experiencing intermittent human traffic including bathrooms, classrooms, cafeterias, or other spaces where quality of air is a concern.

• Adjustments for air quality setpoint, minimum and maximum fan speed
• Fan speed and VOC level are available as analog outputs to be read by a building automation system or secondary device.

Vibration isolation kit for suspended installation to minimize vibration, ensuring quiet operation.

The Vari-Green transformer provides a 24-volt power source from the existing line voltage at the fan to the motor and controls. It has two dry auxiliary contacts (one normally open and one normally closed) available to signal a motorized damper or interlock with other devices.

Switches may be used on model SP and CSP fans to enable manual control of your fan or fan and light combination. Single pole rocker switch assembly rated for 120-277V, 15A. UL Listed.

The Constant Pressure Control can be used to monitor static pressure in a system, automatically adjusting the fan speed to maintain a desired static pressure. This control reduces energy consumption not only by reducing the speed and the energy used by the fan, but will also reduce the amount of conditioned air that is exhausted. Recommended for use in multi-family structures, hotels and schools where demand control ventilation applications exist.

• 2-line, backlit display
• Dedicated airflow control mode
• NEMA-4 enclosure on all components
• Pressure range of +/- 1.0 inch wg
• Remote pressure transducer provides installation flexibility
• Intended for use with Greenheck's Vari-Green motor and Vari-Green Drive

The Vari-Green remote dial control allows the user to manually adjust the fan's speed from a remote location. This control includes a countdown timer to automatically turn the fan off after 10, 30, 60 or 90 minutes. Recommended for use in commercial buildings and restaurants.

• Mounts to a single or multi-gang junction box
• Includes lockout feature to prevent tampering.

Dehumidistats are available with models SP and CSP fans to ventilate humid spaces. The sensor automatically detects excess humidity and activates a ventilation fan for control of excess condensation. There are automatic, manual, or air cycle modes. This can replace a single pole switch for control of a ventilating fan.

Switches may be used on model SP and CSP fans to enable manual control of your fan or fan and light combination. Two single pole combination switch assembly rated for 120V, 15A. UL Listed.

When the temperature in the space rises above the set point of 50 F - 90 F the contacts close and the thermostat will signal the fan to come on in order to exhaust air from the space. Includes face mounted thermometer that displays room temperature.

GPI roof curbs are designed for flat, insulated or non-insulated roof decks. Constructed of 18 gauge galvanized steel and fully formed on three sides with a single, fully welded seam.

• Designed to fit 19" roof curb cap
• 2-inch mounting flange
• Rigid, fiberglass insulation
• Welded, straight-sided construction

Adjustable for temperature ranges between 30ºF to 110ºF (-1ºC to 43ºC), 120V, 16 amp

The Constant Pressure Control can be used to monitor static pressure in a system, automatically adjusting the fan speed to maintain a desired static pressure. This control reduces energy consumption not only by reducing the speed and the energy used by the fan, but will also reduce the amount of conditioned air that is exhausted. Recommended for use in multi-family structures, hotels and schools where demand control ventilation applications exist.

• 2-line, backlit display
• Dedicated airflow control mode
• Integral pressure transducer maintains compact form
• NEMA-4 enclosure on all components
• Pressure range of +/- 1.0 inch wg
• Intended for use with Greenheck's Vari-Green motor and Vari-Green Drive

The Constant Pressure Control can be used to monitor static pressure in a system, automatically adjusting the fan speed to maintain a desired static pressure. This control reduces energy consumption not only by reducing the speed and the energy used by the fan, but will also reduce the amount of conditioned air that is exhausted. Recommended for use in multi-family structures, hotels and schools where demand control ventilation applications exist.

• 2-line, backlit display
• Dedicated airflow control mode
• NEMA-4 enclosure on all components
• Pressure range of +/- 1.0 inch wg
• Remote pressure transducer provides installation flexibility
• Intended for use with Greenheck's Vari-Green motor and Vari-Green Drive

Switches may be used on model SP and CSP fans to enable manual control of your fan or fan and light combination. Single pole light combination switch assembly rated for 120V, 15A. UL Listed.

The Constant Pressure Control can be used to monitor static pressure in a system, automatically adjusting the fan speed to maintain a desired static pressure. This control reduces energy consumption not only by reducing the speed and the energy used by the fan, but will also reduce the amount of conditioned air that is exhausted. Recommended for use in multi-family structures, hotels and schools where demand control ventilation applications exist.

• 2-line, backlit display
• Dedicated airflow control mode
• Integral pressure transducer maintains compact form
• NEMA-4 enclosure on all components
• Pressure range of +/- 1.0 inch wg
• Intended for use with Greenheck's Vari-Green motor and Vari-Green Drive

The Constant Pressure Control can be used to monitor static pressure in a system, automatically adjusting the fan speed to maintain a desired static pressure. This control reduces energy consumption not only by reducing the speed and the energy used by the fan, but will also reduce the amount of conditioned air that is exhausted. Recommended for use in multi-family structures, hotels and schools where demand control ventilation applications exist.

• 2-line, backlit display
• Dedicated airflow control mode
• NEMA-4 enclosure on all components
• Pressure range of +/- 1.0 inch wg
• Remote pressure transducer provides installation flexibility
• Intended for use with Greenheck's Vari-Green motor and Vari-Green Drive

For natural gravity or positive pressure systems, model GRSF offers excellent performance and durability for intake or relief applications. Featuring an exceptional low silhouette design and rugged construction this model is both efficient and economical.

• All aluminum exterior for corrosion-resistant construction
• Integral birdscreen to prevent entry of birds and small objects
• 19 x 19 inch base with built-in flashing flange and prepunched mounting holes for quick and easy installations without a roof curb

The Indoor Air Quality Temperature / Humidity control monitors the temperature and/or the relative humidity in a space. It will automatically adjust the ventilation rate to or from a space by increasing or decreasing the speed of the fan based on the desired set point. Recommended for use in assisted living facilities, schools, prisons and buildings constructed of materials that are more sensitive to high moisture levels.

• Adjustments for set point, minimum and maximum fan speed
• Fan speed and temperature or humidity level are available as an analog output to read by a building automation system or secondary device.

Time delay switches save energy by automatically turning off equipment. They may be used with SP and CSP fans or fan and light combinations for extended operating time of fan. Time delay switches act in the same manner as a standard switch, however, there is a delay of 10 to 60 minutes after the fan has been turned off.

Transformers are available for applications requiring voltage reduction. Selection is based on motor amperage. Rated for 115 to 230/277V, 6.5A.

The Constant Pressure Control can be used to monitor static pressure in a system, automatically adjusting the fan speed to maintain a desired static pressure. This control reduces energy consumption not only by reducing the speed and the energy used by the fan, but will also reduce the amount of conditioned air that is exhausted. Recommended for use in multi-family structures, hotels and schools where demand control ventilation applications exist.

• 2-line, backlit display
• Dedicated airflow control mode
• Integral pressure transducer maintains compact form
• NEMA-4 enclosure on all components
• Pressure range of +/- 1.0 inch wg
• Intended for use with Greenheck's Vari-Green motor and Vari-Green Drive

Pitched roof cap discharge accessory constructed of steel with black enamel finish. Includes integral flashing flash, built-in birdscreen and damper.

Wall louvered discharge with anodized aluminum grille designed for exterior applications. Units feature built-in damper to eliminate backdrafts.

Motion detectors use a passive infrared motion detector to automatically turn the fan on when a change in motion is sensed. They have a viewing area of 180 degrees, however they must be placed in the line-of-sight. May be used with SP and CSP fans or fan/light combinations.

The Constant Airflow Control is used to monitor velocity pressure in a system, automatically adjusting the fan speed to maintain a desired velocity pressure (constant CFM). This control reduces energy consumption not only by reducing the speed and the energy used by the fan, but will also reduce the amount of conditioned air that is exhausted. Recommended for use in multi-family structures, hotels and schools where demand control ventilation applications exist.

• 2-line, backlit display
• Dedicated airflow control mode
• NEMA-4 enclosure on all components
• Pressure range of +/- 1.0 inch wg
• Remote pressure transducer provides installation flexibility
• Intended for use with Greenheck's Vari-Green motor and Vari-Green Drive

The Vari-Green remote dial control allows the user to manually adjust the fan's speed from a remote location. This control mounts to a wall using a 2x4 junction box and is supplied with a wall cover plate. Recommended for use in commercial buildings and restaurants.

Brick vents provide a permanent means of ventilation for crawl spaces, hung ceilings, incinerator rooms, chimney flues, foundations, pipe spaces and corridors. Extruded construction provides a quality finished appearance. A high water stop at the rear and deep overlapping blades with storm stops provide maximum resistance to rain and weather.

• Anodized aluminum construction
• Built in aluminum mesh insect screen

Hooded wall cap with rectangular duct connection designed for outside wall applications. Constructed of steel with black enamel finish, units feature built-in birdscreen and damper.

Transformers are available for applications requiring voltage reduction. Selection is based on motor amperage. Rated for 115 to 230/277V, 8.6A.